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Rust 1.89 expands x86 support, stabilizes APIs, and downgrades macOS x86_64 support (alternativeto.net)

submitted 3 weeks ago* (last edited 3 weeks ago) by tonytins@pawb.social to c/programming@programming.dev

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Rust 1.89 is now released, expanding x86 and x86/x86_64 platform support with new processor instructions and features, including additional AVX-512 intrinsics. The target_feature attribute adds support for SHA512, SM3, SM4, KL, and WIDEKL, giving developers better access to modern CPU capabilities directly from Rust code.

Full changelog: https://blog.rust-lang.org/2025/08/07/Rust-1.89.0/

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[–] Giooschi@lemmy.world 12 points 3 weeks ago

https://doc.rust-lang.org/nightly/rustc/platform-support.html

Tier 1 targets can be thought of as "guaranteed to work". The Rust project builds official binary releases for each tier 1 target, and automated testing ensures that each tier 1 target builds and passes tests after each change.

https://doc.rust-lang.org/nightly/rustc/target-tier-policy.html#tier-1-target-policy

The target must build and pass tests reliably in CI, for all components that Rust's CI considers mandatory.

Github is removing support for CI on that target, and since that's a requirement for Tier 1 support the target has to be downgraded.